Fuels and Combustion Softening temperature of coal ash is a measure of the __________ of coal. Caking tendency Clinkering tendency Size stability Coking tendency Caking tendency Clinkering tendency Size stability Coking tendency ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously There are chances of explosion during preheating It reduces its calorific value tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously There are chances of explosion during preheating It reduces its calorific value tremendously ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuels is generally not used in thermal power plant boiler firing? Coal middling from washeries F. gas, coke oven gas and L.D. converter gas Pulverised coking coal Furnace oil, light diesel oil and tar/PCM Coal middling from washeries F. gas, coke oven gas and L.D. converter gas Pulverised coking coal Furnace oil, light diesel oil and tar/PCM ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke oven gas burns with an yellowish flame, because of the presence of CH₄ NH₃ CO₂ H₂ CH₄ NH₃ CO₂ H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Mineral matter content (M) and ash content (A) in coal are approximately related as M = A M = 2A M = 1.5A M = 1.1A M = A M = 2A M = 1.5A M = 1.1A ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 3 & 10 15 & 8 10 & 3 10 & 20 3 & 10 15 & 8 10 & 3 10 & 20 ANSWER DOWNLOAD EXAMIANS APP
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